EP3401992B1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

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Publication number
EP3401992B1
EP3401992B1 EP16883942.1A EP16883942A EP3401992B1 EP 3401992 B1 EP3401992 B1 EP 3401992B1 EP 16883942 A EP16883942 A EP 16883942A EP 3401992 B1 EP3401992 B1 EP 3401992B1
Authority
EP
European Patent Office
Prior art keywords
electrode tab
negative electrode
vent part
secondary battery
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16883942.1A
Other languages
German (de)
English (en)
Other versions
EP3401992A4 (fr
EP3401992A1 (fr
Inventor
Kwan Soo Lee
Duk Hyun Ryu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Energy Solution Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Publication of EP3401992A1 publication Critical patent/EP3401992A1/fr
Publication of EP3401992A4 publication Critical patent/EP3401992A4/fr
Application granted granted Critical
Publication of EP3401992B1 publication Critical patent/EP3401992B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/595—Tapes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to a secondary battery, and more particularly, to a secondary battery that is capable of preventing corrosion within the battery from occurring.
  • Batteries (cells) that generate electric power through physical or chemical reaction to supply the generated power to the outside are used when AC power to be supplied to the building is not obtained, or DC power is required according to the living environments surrounded by various electric and electronic devices.
  • primary batteries and secondary batteries which are chemical batteries using chemical reaction
  • the primary batteries are consumable cells which are collectively referred to as dry cells.
  • secondary batteries are rechargeable batteries that are manufactured by using a material in a redox process between current and a substance is repeatable several times. When the reduction reaction is performed on the material by the current, power is charged, and when the oxidation reaction is performed on the material, power is discharged. Such the charging-discharging is repeatedly performed to generate electricity.
  • a lithium ion battery of the secondary batteries is manufactured through the following processes.
  • An active material is applied to each of a positive electrode conductive foil and a negative electrode conductive foil at a predetermined thickness, and a separator is disposed between the positive electrode conductive foil and the negative electrode conductive foil, and then, an electrode assembly, in which the positive electrode conductive foil, the separator, and the negative electrode conductive foil are wound several times in a jelly-roll or cylindrical shape, is accommodated into a cylindrical or prismatic can, a pouch, and the like to seal the resultant product, thereby manufacturing the lithium ion battery.
  • a case of a lithium ion battery according to the related art is disclosed in Korean Patent Publication No. 10-1997-0054691 .
  • the case of the lithium ion battery according to the related art includes a vent in a bottom surface of a can to discharge a gas when an internal pressure increases.
  • a pre-plated nickel (Ni) layer of the can may be damaged by punching that is introduced for forming the vent.
  • a portion of the tab may be bent. Also, when the bent tab comes into contact with the vent, the nickel layer may be additionally lost to accelerate corrosion within the can due to the resistance current applied during the welding.
  • KR 101308206 B1 discloses a secondary battery comprising: an electrode assembly provided with an electrode tab; a can member accommodating the electrode assembly and comprising a vent part for discharging a gas when an internal pressure increases; and a protection member being attached to the electrode tab, preventing the electrode tab and the vent part from coming into contact with each other, wherein the electrode tab comprises a negative electrode tab.
  • EP 2 416 406 A1 discloses a secondary battery comprising: an electrode assembly; a first electrode tab and a second electrode tab connected to the electrode assembly; an electrolyte; a tape covering at least part of an outer surface of the first electrode tab, the tape comprising a base layer; and a case arranged to accommodate the electrode assembly, first electrode tab, second electrode tab electrolyte and the tape, wherein contact with the electrolyte is arranged to cause at least a portion of the base layer to exhibit an adhesive property, so that portion of the base layer is arranged to adhesively contact at least one surface inside the case.
  • an object of the prevent invention is to provide a secondary battery that is capable of preventing a tab member of an electrode assembly from coming into contact with a vent part of a can member.
  • a secondary battery according to the present invention includes an electrode assembly provided with an electrode tab, a can member accommodating the electrode assembly and comprising a vent part for discharging a gas when an internal pressure increases, and a protection member preventing the electrode tab and the vent part from coming into contact with each other, wherein the vent part is formed to be thinner than other portions of the bottom portion of the can member; wherein the electrode tab comprises a negative electrode tab; and wherein the protection member (30) is attached to a width of 2 mm to 7 mm of the negative electrode tab so as to adhere to the surface of the negative electrode tab, which comes into contact with the vent part.
  • the protection member may include at least one adhesion film made of polypropylene (PP), polyimide (PI), or polyester (PET).
  • PP polypropylene
  • PI polyimide
  • PET polyester
  • the protection member may have a thickness of 3 um to 50 um.
  • the contact between the electrode tab and the vent part may be blocked to prevent the corrosion within the can member from occurring.
  • FIG. 1 is a schematic view illustrating a configuration of a main part of a secondary battery according to an embodiment of the present invention.
  • a secondary battery includes an electrode assembly 10 on which an electrode tab 11 is disposed, a can member 20 accommodating the electrode assembly 10 and including a vent part 21 for discharging a gas when an internal pressure increases, and a protection member 30 preventing the electrode tab 11 and the vent part 21 from coming into contact with each other.
  • the electrode assembly 10 includes a positive electrode having both surfaces coated with a positive electrode active material, a negative electrode having both surfaces coated with a negative electrode active material, and a separator disposed between the positive electrode and the negative electrode to prevent the positive electrode and the negative electrode from being short-circuited and allowing only lithium ions to be movable,
  • the electrode assembly 10 is wound in an approximately circular shape and accommodated into the cylindrical can member 20.
  • the can member 20 may be made of aluminum (Al), iron (Fe), or an alloy thereof, but the can member 20 according to the present invention is not limited to the above-described materials.
  • a chalcogenide compound is used as the positive electrode active material.
  • the chalcogenide compound include composite metal oxides such as LiCoO 2 , LiMn 2 O 4 , LiNiO 2 , LiNi 1-x CO x O 2 (0 ⁇ x ⁇ 1), and LiMnO 2 .
  • Exemplary examples of the negative electrode active material include carbon (C)-based materials, silicon (Si), tin (Sn), tin oxides, compositetin alloys, transition metal oxides, lithium metal nitrides, or lithium metal oxides.
  • the positive electrode is made of an aluminum (Al) material
  • the negative electrode is made of a copper (Cu) material
  • the separator may be manufactured by applying a polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP co-polymer) to one material selected from the group consisting of polyethylene (PE), polystyrene (PS), polypropylene (PP), and a co-polymer of polyethylene (PE) and polypropylene (PP), but the present invention is not limited to the above materials.
  • PVDF-HFP co-polymer polyvinylidene fluoride-hexafluoropropylene copolymer
  • the positive electrode may be made of an aluminum (Al) material, and a non-coating portion that is not coated with the active material is formed on an end of at least one surface of both surfaces of the positive electrode,
  • the negative electrode may be made of a copper (Cu) material, and a non-coating portion that is not coated with the active material is formed on an end of at least one surface of both surfaces of the negative electrode.
  • Cu copper
  • the electrode tab 11 is attached to the non-coating portion of each of the positive electrode and the negative electrode and electrically connected to the outside of the electrode assembly 10.
  • the electrode tab 11 attached to the non-coating portion of the positive electrode may be a positive electrode tab
  • the electrode tab 11 attached to the non-coating portion of the negative electrode may be a negative electrode tab.
  • the electrode tab 11 comprises a negative electrode tab.
  • the negative electrode tab will be described.
  • FIG. 2 is a view illustrating a state in which the electrode tab and the vent part of the secondary battery come into contact with each other.
  • the can member 20 of a cylindrical type battery and a prismatic type battery comes to the force in safety enhancement due to the expansion of the application of electric vehicles.
  • the vent part 21 is provided in a bottom portion of the can member 20.
  • the vent part 21 is formed to be thinner than other portions of the bottom portion of the can member 20 so that a gas generated in the can member 20 is discharged to the outside while being cut when an internal pressure of the can member 20 increases.
  • the negative electrode tab of the electrode tabs 11 of the electrode assembly 10 is disposed on the bottom portion of the can member 20 to come into contact with the vent part 21.
  • the nickel (Ni) layer may be additionally lost by the vent part 21 due to resistance current applied during the welding to accelerate corrosion within the can member 20.
  • the protection member 30 is attached to the negative electrode tab to prevent the negative electrode tab from coming into contact with the vent part 21.
  • FIG. 3 is a schematic rear view illustrating a state in which the protection member is attached to the electrode tab according to an embodiment of the present invention.
  • the protection member 30 may be provided as at least one adhesion film made of polypropylene (PP), polyimide (PI), polyester (PET), or the like, which have excellent insulation and heat resistance and be attached to the negative electrode tab.
  • PP polypropylene
  • PI polyimide
  • PET polyester
  • the protection member 30 is attached to a width of 2 mm to 7 mm of the negative electrode tab so as to adhere to the surface of the negative electrode tab, which comes into contact with the vent part 21.
  • the protection member 30 has a thickness of 3 um to 50 um so that the thickness of the protection member 30 does not affect a size of the battery.
  • the contact between the electrode tab and the vent part may be blocked to prevent the corrosion within the can member from occurring.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)

Claims (3)

  1. Batterie rechargeable comprenant :
    un ensemble électrodes (10) muni d'une languette d'électrode (11) ;
    un élément de boîte (20) accommodant l'ensemble électrodes (10) et comprenant une partie évent (21) pour décharger un gaz quand la pression interne augmente ; et
    un élément de protection empêchant la languette d'électrode (11) et la partie évent (21) d'entrer en contact l'une avec l'autre,
    dans laquelle la partie évent (21) est formée pour être plus mince que les autres parties de la partie inférieure de l'élément de boîte (20) ;
    dans laquelle la languette d'électrode (11) comprend une languette d'électrode négative ; et
    dans laquelle l'élément de protection (30) est fixé à une largeur comprise entre 2 mm et 7 mm de la languette d'électrode négative de façon à adhérer à la surface de la languette d'électrode négative qui entre en contact avec la partie évent (21).
  2. Batterie rechargeable selon la revendication 1, dans laquelle l'élément de protection (30) comprend un ou plusieurs films d'adhérence fabriqués en polypropylène (PP), polyimide (PI) ou polyester (PET).
  3. Batterie rechargeable selon la revendication 1, dans laquelle l'élément de protection (30) a une épaisseur comprise entre 3 µm et 50 µm.
EP16883942.1A 2016-01-07 2016-06-14 Batterie secondaire Active EP3401992B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160002045A KR102023717B1 (ko) 2016-01-07 2016-01-07 2차전지
PCT/KR2016/006310 WO2017119556A1 (fr) 2016-01-07 2016-06-14 Batterie secondaire

Publications (3)

Publication Number Publication Date
EP3401992A1 EP3401992A1 (fr) 2018-11-14
EP3401992A4 EP3401992A4 (fr) 2019-01-23
EP3401992B1 true EP3401992B1 (fr) 2021-11-24

Family

ID=59273667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16883942.1A Active EP3401992B1 (fr) 2016-01-07 2016-06-14 Batterie secondaire

Country Status (5)

Country Link
US (1) US10644285B2 (fr)
EP (1) EP3401992B1 (fr)
KR (1) KR102023717B1 (fr)
CN (1) CN107925121B (fr)
WO (1) WO2017119556A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10700395B2 (en) 2016-08-09 2020-06-30 Nio Usa, Inc. Battery module housing having an integrally-formed cooling plate
US10601090B2 (en) * 2017-04-28 2020-03-24 Nio Usa, Inc. Using a spacer to block path of thermally conductive structural adhesive in lithium ion cells
JP7460606B2 (ja) 2018-09-11 2024-04-02 エナジャイザー ブランズ リミテッド ライアビリティ カンパニー スロット付きグロメットを備えた補聴器用電池
US11641044B1 (en) 2020-04-14 2023-05-02 Energizer Brands, Llc Battery housing and systems and methods of making thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1685612B1 (fr) * 2003-11-21 2011-10-26 Eveready Battery Company, Inc. Batterie au lithium a capacite de charge elevee

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970054691A (ko) 1995-12-22 1997-07-31 배순훈 리튬전지의 케이스
KR100528915B1 (ko) 2003-05-26 2005-11-16 삼성에스디아이 주식회사 이차전지
JP4073378B2 (ja) 2003-08-22 2008-04-09 株式会社東芝 アルミニウム負極電池
KR100686859B1 (ko) * 2005-09-28 2007-02-26 삼성에스디아이 주식회사 이차 전지
KR101308206B1 (ko) * 2007-09-10 2013-09-13 삼성에스디아이 주식회사 원통형 이차전지
JP2009231261A (ja) * 2008-02-26 2009-10-08 Sanyo Electric Co Ltd 非水電解質二次電池
US9029007B2 (en) 2009-04-03 2015-05-12 Samsung Sdi Co., Ltd. Rechargeable battery including first and second metallic plates coupled together and a cap assembly including an insulator
US8802281B2 (en) * 2010-08-05 2014-08-12 Samsung Sdi Co., Ltd. Secondary battery with movement prevention tape
EP2693525B1 (fr) * 2011-05-09 2015-08-05 Nippon Steel & Sumitomo Metal Corporation Boîtier pour une batterie de stockage
KR101462041B1 (ko) 2011-11-15 2014-11-19 에스케이이노베이션 주식회사 파우치형 이차전지
KR20150034564A (ko) * 2013-09-26 2015-04-03 주식회사 엘지화학 리튬 이차전지
KR102209831B1 (ko) * 2014-02-20 2021-01-29 삼성에스디아이 주식회사 캡 어셈블리 및 이를 포함하는 이차 전지

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1685612B1 (fr) * 2003-11-21 2011-10-26 Eveready Battery Company, Inc. Batterie au lithium a capacite de charge elevee

Also Published As

Publication number Publication date
KR102023717B1 (ko) 2019-09-20
KR20170082819A (ko) 2017-07-17
EP3401992A4 (fr) 2019-01-23
CN107925121B (zh) 2020-02-28
US10644285B2 (en) 2020-05-05
EP3401992A1 (fr) 2018-11-14
CN107925121A (zh) 2018-04-17
US20180219199A1 (en) 2018-08-02
WO2017119556A1 (fr) 2017-07-13

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